我已使用以下代码制作了多轴图,但无法按需要排列图例。我的图的代码如下:
import matplotlib.pyplot as plt
import numpy as np
x = np.arange(4)
y = [5, 7, 4, 9]
z = [9, 3, 5, 6]
r = [30, 40, 45, 37]
fig,ax = plt.subplots()
abc = ax.bar(x,y,0.25 )
cde = ax.bar(x+0.25,z,0.25)
ax.legend((abc[0], cde[0]), ('y', 'z'),bbox_to_anchor=(0., 1.02, 1, .102) , borderaxespad=0.)
ax.set_xticks(x + 0.25 / 2)
ax.set_xticklabels(('A', 'B', 'C', 'D'))
ax2 = ax.twinx()
efg = ax2.plot(x+0.25/2,r,color = 'black',label = "r")
ax2.legend(bbox_to_anchor=(0.11,1.07) , borderaxespad=0.)
plt.show()
右上角的图例垂直对齐,但我希望它们水平对齐。我找不到与此有关的任何文档。我希望它们如下图所示。
谢谢
您需要使用ncol
参数,该参数设置要在图例中使用的列数,例如ncol=2
将为您提供两列。
ax.legend(..., ncol=2)
然后,您可以查看如何使用loc
参数和一起放置图例bbox_to_anchor
,以找到明智的参数并使两个图例彼此对齐:
import matplotlib.pyplot as plt
import numpy as np
x = np.arange(4)
y = [5, 7, 4, 9]
z = [9, 3, 5, 6]
r = [30, 40, 45, 37]
fig,ax = plt.subplots()
abc = ax.bar(x,y,0.25 )
cde = ax.bar(x+0.25,z,0.25)
ax.legend((abc[0], cde[0]), ('y', 'z'),loc="lower right", bbox_to_anchor=(1., 1.02) , borderaxespad=0., ncol=2)
ax.set_xticks(x + 0.25 / 2)
ax.set_xticklabels(('A', 'B', 'C', 'D'))
ax2 = ax.twinx()
efg = ax2.plot(x+0.25/2,r,color = 'black',label = "r")
ax2.legend(bbox_to_anchor=(0,1.02),loc="lower left", borderaxespad=0.)
plt.show()
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我来说两句